Bill Pulte, looking harmless Welcome back to PCB Central, a newsletter by legal scholar, financial historian, amateur powerlifter/triathlete, and Wharton professor Peter Conti-Brown. Yesterday was a weightlifting + long run day. My runs are getting faster at length—I keep my heart rate in zone 2, up to 9 miles now, and keeping a pace of below 10 min miles (or 6 mph). Eventually, I want my long runs to be above 20 miles and try to get that pace as fast as possible without going above 150 bpm.